18650 Battery Buying Guide (test on all from eBay below $3)

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Hello,

I have made this guide because when I wanted to buy a proper 18650 battery for my flashlight. And then I got tired of all forum posts on internet about fake batteries sold at eBay. To get a correct understanding about the 18650 battery situation on eBay, I decided to buy all different battery-variants sold at eBay for less than $3, it turned out to become 23 different ones. They were all ordered on the 29 of December 2013.

Each time I recceived a battery, I charged it fully and discharged it fully using iMax B8 charger. Below you can find complete results of this test. (Reason for choosing 0.5A charging was because most chargers comming with flashlights charges with about 0.5A. And reason for 0.5A discharging is because a typical flashlight consume between 0.18 - 0.83A).

(tables will be updated when I receive new batteries for testing).
 
Batteries passed test (>=70% as rated electric charge)
Brand (color) Advertised
electric
charge
Measured
electric
charge*
% Price/each
including shipping
Seller
LGABC21865
K314K106A3
(reference battery)
2800 mAh 2253 mAh 80% $6.99 camfm
  
Batteries not passed test (<7 0% as rated electric charge)
Brand (color) Advertised
electric
charge
Measured
electric
charge*
% Price/each
including shipping
Selle Status
UltraFire (black) 3600 mAh 990-1218 mAh 28-34% $2.54 dressinghere Full refund received
TangsFire (orange) 3800 mAh 876-880 mAh 23% $3.00 dealbuy-market Full refund received
FirePeak (silver) 3200mAh 704 mAh 22% $2.39 rabbitshcf Claim opened
GTL (green) 3000 mAh 570-595 mAh 19-20% $1.84 rabbitshcf Claim opened
TOMO (red) 3200 mAh 445 mAh 14% $2.04 hohfashion Full refund received
UltraFire (red) 4200 mAh 430-495 mAh 10-12% $3.76 rabbitshcf Claim opened
TangsFire (yellow) 3800mAh 412-1002 mAh 11-26% $3.00 dealbuy-market Full refund received
UltraFire (purple) 4900 mAh 395 mAh 8% $2.42 rabbitshcf Full refund received
S.S (blue) 3000 mAh 364 mAh 12% $1.75  bg27cyf Full refund received
UltraFire (red) 4000 mAh 297-697 mAh 7-17% $2.15 rabbitshcf Claim opened
UltraFire (gray) 2400 mAh 291-433 mAh 12-18% $2.98 hittime_hk Full refund received
GTL (purple) 3800mAh 184-429 mAh 5-11% $2.44 mybic Full refund received
UltraFire (blue) 3000 mAh 85-643 mAh 3-21% $1.74 elec-mall Full refund received
UltraFire (blue) 4000 mAh 5-1073 mAh 0-27% $2.04 rabbitshcf Claim opened

Batteries never received
Brand (color) Advertised
electric
charge
Price/each
including shipping
Seller Status
UltraFire (blue) 2400 mAh $2.43 cn-resource  
UltraFire (red) 3000 mAh $1.63 dealex2011  
UltraFire (gray) 3200 mAh $1.63 toymodel55  
UltraFire (blue) 3800 mAh $1.66 abeyerr Full refund received
UltraFire (red) 3800 mAh $1.95 dohairx  
UltraFire (black) 4000 mAh $1.63 dealex2011  
UltraFire (purple) 4500 mAh $1.66 abeyerr Full refund received
TR (blue) 3200mAh $2.00 waltzmart_uk  
GTL (red) 5300mAh $1.79 toymodel55  

* CC/CV C harging current of 0.5 A to 4.2 V. Dischaged 0.5 A to 3 V.





 
Picture Brand (color) Advertised
electric
charge
Measured
electric
charge*
% Price/each

including shipping

Seller
  UltraFire (blue) 2400 mAh Not received yet   $2.43 cn-resource
  UltraFire (gray) 2400 mAh Not received yet   $2.98 hittime_hk
  UltraFire (red) 3000 mAh Not received yet   $1.63 dealex2011
  UltraFire (blue) 3000 mAh 85-643 mAh 3-21% $1.74 elec-mall
  UltraFire (gray) 3200 mAh Not received yet   $1.63 toymodel55
  UltraFire (black) 3600 mAh Not received yet   $2.54 dressinghere
  UltraFire (blue) 3800 mAh Not received yet   $1.66 abeyerr
  UltraFire (red) 3800 mAh Not received yet   $1.95 dohairx
  UltraFire (black) 4000 mAh Not received yet   $1.63 dealex2011
  UltraFire (blue) 4000 mAh Not received yet   $2.04 rabbitshcf
  UltraFire (red) 4000 mAh Not received yet   $2.15 rabbitshcf
  UltraFire (red) 4200 mAh Not received yet   $3.76 rabbitshcf 
  UltraFire (purple) 4500 mAh Not received yet   $1.66 abeyerr
  UltraFire (purple) 4900 mAh Not received yet   $2.42 rabbitshcf
  S.S (blue) 3000mAh 364 mAh 12% $1.75 bg27cyf
  TOMO (red) 3200mAh Not received yet   $2.04 hohfashion
  FirePeak (silver) 3200mAh Not received yet   $2.39 rabbitshcf
  TR (blue) 3200mAh Not received yet   $2.00 waltzmart_uk
  GTL (red) 5300mAh Not received yet   $1.79 toymodel55
  GTL (green) 3000mAh Not received yet   $1.84 rabbitshcf 
  GTL (purple) 3800mAh Not received yet   $2.44 mybic
  TangsFire (yellow) 3800mAh Not received yet   $3.00 dealbuy-market
  TangsFire (orange) 3800mAh Not received yet   $3.00 dealbuy-market
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